Remove updates from pod mutating webhook (open-telemetry#2584)

* Remove 'update' from pod mutating webhook for autoinstrumentation

* Revert shebang

* Add chlog entry

* Rename chloggen file

.chloggen/webhook-remove-pod-update.yaml

@@ -0,0 +1,16 @@
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: 'bug_fix'
+
+# The name of the component, or a single word describing the area of concern, (e.g. operator, target allocator, github action)
+component: operator
+
+# A brief description of the change. Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: "Removes UPDATE from pod mutating admission webhook since it only needs to mutate on pod CREATE events."
+
+# One or more tracking issues related to the change
+issues: [1514]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext: "The pod webhook currently modifies the pod spec in invalid ways on UPDATE events, and UPDATES are not necessary in the webhook."

bundle/manifests/opentelemetry-operator.clusterserviceversion.yaml

@@ -65,7 +65,7 @@ metadata:
     categories: Logging & Tracing,Monitoring
     certified: "false"
     containerImage: ghcr.io/open-telemetry/opentelemetry-operator/opentelemetry-operator
-    createdAt: "2024-03-01T10:16:23Z"
+    createdAt: "2024-03-04T14:38:01Z"
     description: Provides the OpenTelemetry components, including the Collector
     operators.operatorframework.io/builder: operator-sdk-v1.29.0
     operators.operatorframework.io/project_layout: go.kubebuilder.io/v3
@@ -587,7 +587,6 @@ spec:
       - v1
       operations:
       - CREATE
-      - UPDATE
       resources:
       - pods
     sideEffects: None

config/webhook/manifests.yaml

@@ -80,7 +80,6 @@ webhooks:
     - v1
     operations:
     - CREATE
-    - UPDATE
     resources:
     - pods
   sideEffects: None

internal/webhook/podmutation/webhookhandler.go

@@ -29,7 +29,7 @@ import (
 	"github.com/open-telemetry/opentelemetry-operator/internal/config"
 )
 
-// +kubebuilder:webhook:path=/mutate-v1-pod,mutating=true,failurePolicy=ignore,groups="",resources=pods,verbs=create;update,versions=v1,name=mpod.kb.io,sideEffects=none,admissionReviewVersions=v1
+// +kubebuilder:webhook:path=/mutate-v1-pod,mutating=true,failurePolicy=ignore,groups="",resources=pods,verbs=create,versions=v1,name=mpod.kb.io,sideEffects=none,admissionReviewVersions=v1
 // +kubebuilder:rbac:groups="",resources=namespaces,verbs=list;watch
 // +kubebuilder:rbac:groups=opentelemetry.io,resources=opentelemetrycollectors,verbs=get;list;watch
 // +kubebuilder:rbac:groups=opentelemetry.io,resources=instrumentations,verbs=get;list;watch

tests/e2e-upgrade/upgrade-test/opentelemetry-operator-v0.86.0.yaml

@@ -8464,7 +8464,6 @@ webhooks:
           - v1
         operations:
           - CREATE
-          - UPDATE
         resources:
           - pods
     sideEffects: None